NFC: Implement HCI DEP send and receive data

And implement the corresponding hooks for pn544.

Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 51 insertions, 7 deletions

diff --git a/drivers/nfc/pn544_hci.c b/drivers/nfc/pn544_hci.c
index 4ed2b8356017..554faf0a92d7 100644
--- a/drivers/nfc/pn544_hci.c
+++ b/drivers/nfc/pn544_hci.c
@@ -900,7 +900,7 @@ static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
  * <= 0: driver handled the data exchange
  *    1: driver doesn't especially handle, please do standard processing
  */
-static int pn544_hci_data_exchange(struct nfc_hci_dev *hdev,
+static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
                                    struct nfc_target *target,
                                    struct sk_buff *skb, data_exchange_cb_t cb,
                                    void *cb_context)
@@ -953,11 +953,26 @@ static int pn544_hci_data_exchange(struct nfc_hci_dev *hdev,
                 return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
                                               PN544_JEWEL_RAW_CMD, skb->data,
                                               skb->len, cb, cb_context);
+        case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
+                *skb_push(skb, 1) = 0;
+
+                return nfc_hci_send_event(hdev, target->hci_reader_gate,
+                                        PN544_HCI_EVT_SND_DATA, skb->data,
+                                        skb->len);
         default:
                 return 1;
         }
 }
 
+static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+        /* Set default false for multiple information chaining */
+        *skb_push(skb, 1) = 0;
+
+        return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+                                PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+}
+
 static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
                                    struct nfc_target *target)
 {
@@ -996,6 +1011,22 @@ void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event,
                 nfc_hci_send_event(hdev, gate,
                         NFC_HCI_EVT_END_OPERATION, NULL, 0);
                 break;
+        case PN544_HCI_EVT_RCV_DATA:
+                if (skb->len < 2) {
+                        r = -EPROTO;
+                        goto exit;
+                }
+
+                if (skb->data[0] != 0) {
+                        pr_debug("data0 %d", skb->data[0]);
+                        r = -EPROTO;
+                        goto exit;
+                }
+
+                skb_pull(skb, 2);
+                nfc_tm_data_received(hdev->ndev, skb);
+
+                return;
         default:
                 break;
         }
@@ -1014,7 +1045,8 @@ static struct nfc_hci_ops pn544_hci_ops = {
         .dep_link_down = pn544_hci_dep_link_down,
         .target_from_gate = pn544_hci_target_from_gate,
         .complete_target_discovered = pn544_hci_complete_target_discovered,
-        .data_exchange = pn544_hci_data_exchange,
+        .im_transceive = pn544_hci_im_transceive,
+        .tm_send = pn544_hci_tm_send,
         .check_presence = pn544_hci_check_presence,
         .event_received = pn544_hci_event_received,
 };
diff --git a/include/net/nfc/hci.h b/include/net/nfc/hci.h
index 6b2d75dc7c01..bc87b8f2d692 100644
--- a/include/net/nfc/hci.h
+++ b/include/net/nfc/hci.h
@@ -45,9 +45,10 @@ struct nfc_hci_ops {
                                  struct nfc_target *target);
         int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
                                            struct nfc_target *target);
-        int (*data_exchange) (struct nfc_hci_dev *hdev,
+        int (*im_transceive) (struct nfc_hci_dev *hdev,
                               struct nfc_target *target, struct sk_buff *skb,
                               data_exchange_cb_t cb, void *cb_context);
+        int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
         int (*check_presence)(struct nfc_hci_dev *hdev,
                               struct nfc_target *target);
         void (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 777deb84aa73..c2339c468d91 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -616,8 +616,8 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
         switch (target->hci_reader_gate) {
         case NFC_HCI_RF_READER_A_GATE:
         case NFC_HCI_RF_READER_B_GATE:
-                if (hdev->ops->data_exchange) {
-                        r = hdev->ops->data_exchange(hdev, target, skb, cb,
+                if (hdev->ops->im_transceive) {
+                        r = hdev->ops->im_transceive(hdev, target, skb, cb,
                                                      cb_context);
                         if (r <= 0)     /* handled */
                                 break;
@@ -634,8 +634,8 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
                                            skb->len, hci_transceive_cb, hdev);
                 break;
         default:
-                if (hdev->ops->data_exchange) {
-                        r = hdev->ops->data_exchange(hdev, target, skb, cb,
+                if (hdev->ops->im_transceive) {
+                        r = hdev->ops->im_transceive(hdev, target, skb, cb,
                                                      cb_context);
                         if (r == 1)
                                 r = -ENOTSUPP;
@@ -650,6 +650,16 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
         return r;
 }
 
+int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
+{
+        struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+        if (hdev->ops->tm_send)
+                return hdev->ops->tm_send(hdev, skb);
+        else
+                return -ENOTSUPP;
+}
+
 static int hci_check_presence(struct nfc_dev *nfc_dev,
                               struct nfc_target *target)
 {
@@ -758,6 +768,7 @@ static struct nfc_ops hci_nfc_ops = {
         .activate_target = hci_activate_target,
         .deactivate_target = hci_deactivate_target,
         .im_transceive = hci_transceive,
+        .tm_send = hci_tm_send,
         .check_presence = hci_check_presence,
 };